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Origin of the hot gas in low-mass protostars: Herschel-PACS spectroscopy of HH 46

dc.contributor.authorVAN KEMPEN, T. A.
dc.contributor.authorKRISTENSEN, L. E.
dc.contributor.authorHERCZEG, G. J.
dc.contributor.authorVISSER, R.
dc.contributor.authorVAN DISHOECK, E. F.
dc.contributor.authorWAMPFLER, S. F.
dc.contributor.authorBRUDERER, S.
dc.contributor.authorBENZ, A. O.
dc.contributor.authorDOTY, S. D.
dc.contributor.authorBRINCH, C.
dc.contributor.authorHOGERHEIJDE, M. R.
dc.contributor.authorJØRGENSEN, J. K.
dc.contributor.authorTAFALLA, M.
dc.contributor.authorNEUFELD, D.
dc.contributor.authorBACHILLER, R.
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.authorBAUDRY, Alain
dc.contributor.authorBENEDETTINI, M.
hal.structure.identifierHarvard-Smithsonian Center for Astrophysics [CfA]
dc.contributor.authorBERGIN, E. A.
dc.contributor.authorBJERKELI, P.
hal.structure.identifierLabOratoire proCédés énergIe bâtimEnt [LOCIE]
dc.contributor.authorBLAKE, G. A.
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.authorBONTEMPS, Sylvain
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.authorBRAINE, J.
hal.structure.identifierINAF - Osservatorio Astrofisico di Arcetri [OAA]
dc.contributor.authorCASELLI, P.
hal.structure.identifierCentro de Investigaciones Biológicas [CSIC]
dc.contributor.authorCERNICHARO, J.
dc.contributor.authorCODELLA, C.
dc.contributor.authorDANIEL, F.
dc.contributor.authorDI GIORGIO, A. M.
hal.structure.identifierAstronomical Institute Anton Pannekoek [AI PANNEKOEK]
dc.contributor.authorDOMINIK, C.
hal.structure.identifierLaboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
dc.contributor.authorENCRENAZ, P.
dc.contributor.authorFICH, M.
dc.contributor.authorFUENTE, A.
dc.contributor.authorGIANNINI, T.
hal.structure.identifierLaboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
dc.contributor.authorGOICOECHEA, J. R.
dc.contributor.authorDE GRAAUW, Th.
dc.contributor.authorHELMICH, F.
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.authorHERPIN, Fabrice
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.authorJACQ, T.
dc.contributor.authorJOHNSTONE, D.
dc.contributor.authorKAUFMAN, M. J.
dc.contributor.authorLARSSON, B.
dc.contributor.authorLIS, D.
dc.contributor.authorLISEAU, R.
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierSRON Netherlands Institute for Space Research [SRON]
dc.contributor.authorMARSEILLE, M.
dc.contributor.authorMCCOEY, C.
dc.contributor.authorMELNICK, G.
hal.structure.identifierINAF - Osservatorio Astronomico di Roma [OAR]
dc.contributor.authorNISINI, B.
hal.structure.identifierOnsala Space Observatory
dc.contributor.authorOLBERG, M.
hal.structure.identifierCentre d'étude spatiale des rayonnements [CESR]
dc.contributor.authorPARISE, B.
dc.contributor.authorPEARSON, J. C.
dc.contributor.authorPLUME, R.
hal.structure.identifierESO
dc.contributor.authorRISACHER, C.
dc.contributor.authorSANTIAGO-GARCIA, J.
hal.structure.identifierIstituto di Fisica dello Spazio Interplanetario [IFSI]
dc.contributor.authorSARACENO, P.
dc.contributor.authorSHIPMAN, R.
dc.contributor.authorVAN DER TAK, F.
hal.structure.identifierMax-Planck-Institut für Radioastronomie [MPIFR]
dc.contributor.authorWYROWSKI, F.
dc.contributor.authorYILDIZ, U. A.
dc.contributor.authorCIECHANOWICZ, M.
dc.contributor.authorDUBBELDAM, L.
dc.contributor.authorGLENZ, S.
dc.contributor.authorHUISMAN, R.
dc.contributor.authorLIN, R. H.
dc.contributor.authorMORRIS, P.
dc.contributor.authorMURPHY, J. A.
dc.contributor.authorTRAPPE, N.
dc.date.created2010-05-12
dc.date.issued2010
dc.identifier.issn0004-6361
dc.description.abstractEn'Water in Star-forming regions with Herschel' (WISH) is a Herschel Key Programme aimed at understanding the physical and chemical structure of young stellar objects (YSOs) with a focus on water and related species. The low-mass protostar HH 46 was observed with the Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory to measure emission in H2O, CO, OH, [OI], and [CII] lines located between 63 and 186 um. The excitation and spatial distribution of emission can disentangle the different heating mechanisms of YSOs, with better spatial resolution and sensitivity than previously possible. Far-IR line emission is detected at the position of the protostar and along the outflow axis. The OH emission is concentrated at the central position, CO emission is bright at the central position and along the outflow, and H2O emission is concentrated in the outflow. In addition, [OI] emission is seen in low-velocity gas, assumed to be related to the envelope, and is also seen shifted up to 170 km/s in both the red- and blue-shifted jets. Envelope models are constructed based on previous observational constraints. They indicate that passive heating of a spherical envelope by the protostellar luminosity cannot explain the high-excitation molecular gas detected with PACS, including CO lines with upper levels at >2500 K above the ground state. Instead, warm CO and H2O emission is probably produced in the walls of an outflow-carved cavity in the envelope, which are heated by UV photons and non-dissociative C-type shocks. The bright OH and [OI] emission is attributed to J-type shocks in dense gas close to the protostar. In the scenario described here, the combined cooling by far-IR lines within the central spatial pixel is estimated to be 2 \times 10-2 L_sun, with 60-80% attributed to J- and C-type shocks produced by interactions between the jet and the envelope.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enAstrophysics
dc.subject.enSolar and Stellar Astrophysics
dc.title.enOrigin of the hot gas in low-mass protostars: Herschel-PACS spectroscopy of HH 46
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201014615
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.identifier.arxiv1005.2031
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageL121
bordeaux.volume518
bordeaux.peerReviewedoui
hal.identifierhal-00495835
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00495835v1
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